shared-string: remove unused sources

Author: lzaoral

src/lib/CMakeLists.txt

@@ -39,7 +39,6 @@ add_library(cs STATIC
     parser-json-zap.cc
     parser-xml.cc
     parser-xml-valgrind.cc
-    shared-string.cc
     version.cc
     writer.cc
     writer-cov.cc

src/lib/shared-string-ptree.hh

@@ -21,7 +21,6 @@
 
 #include "abstract-tree.hh"
 #include "regex.hh"
-#include "shared-string-ptree.hh"
 #include "version.hh"
 
 #include <algorithm>